Snubbed spring group



Oct. 9, 1956 w. L. SCHLEGEL, JR

SNUBBEID SPRING GROUP Filed April 8, 1952 Ell atetit 2,766,036 Patented Oct. 9, 1956 2,766,036 SN UBBED SPRING GROUP Walter L. Schlegel, Jr., Chicago, Ill., assignor to American Steel Foundries, Chicago, 113., a corporation of New Jersey Application April 8, 1952, Serial No. 281,104 11 Claims. (Cl. 267-9) friction surfaces and associated friction shoes are supported from the same plate.

Other objects of the invention will become apparent in the course of the following description and from an examination of the drawings, wherein:

Figure l is a fragmentary side elevational view of one embodiment of the invention;

Figure 2 is a sectional view of the invention taken along line 22 of Figure 1, and

Figure 3 is a fragmentary plan view taken along lines 33 of Figure 2.

Describing the preferred embodiment of the invention in detail, the group consists of a top plate 2 having a flange 4 depending therefrom and defining spring seat-s rantally disposed on the Centrally of the plate and (llSPOSCCl transversely thereof on its lower side, a friction surface 8 1s formed, the function of which is hereinafter more fully described.

A lower plate 16 is aligned vertically and below the top plate 2 and comprises the upstanding flanges 12, 12, which peripherally define spring seats of the invention thereby affording nection between said plates.

Lugs or bosses 16 and faces of the upper and 10 /6I plates and offer connection resilient conother form such as crowned construction.

28 presents the vertical face 32 engaging one of the friction surfaces and the horizontal face 34 8 of the upper plate 2. A

26 of the lower plate 10, engaging the friction surface recess or spring seat 36 with shown and dealso operative and into engagement with upper plate 2. Hence, if

friction surfaces, thus snubbing or choking the vertical movement between the Horizontal leftward movement of the top plate 2 bottom plate It should be menmay, if desired, be fixedly secured 2 and the Wedging action of the shoe -30 vertical movement between the plates. However, such a construction will not offer the horizontal snubbingaction of the'preferr'ed embodiment described above.

I claim:

1. In a spring group, one of said plates carrying friction surfaces upstanding therefrom, friction shoes disposed intermediate said surfaces and engaging Samoan-area of engagement between spaced resiliently movable 'plates,

said friction shoes delineating a plane having an inclined relation to said surfaces, spring means consisting of coiled springs having ends seated on said one plate, said springs directly engaging both of said friction shoes on the ends opposite the mentioned ends, whereby said shoes are urged away from said one plate and at least one of said shoes is urged to directly engage the other of said plates.

2. In a spring group, spaced plates flexibly movable toward and away from each other, a friction device disposed intermediate said plates operative to snub relative movements therebetween, said device consisting of a pinrality of parallel friction surfaces on one of said plates, friction shoes disposed to engage said friction surfaces, each of said friction shoes having angularly related surfaces, one of which engages the related friction surface and the other of which abuts the other friction shoe, spring means flexibly supporting said friction shoes comprising an individual spring directly engaging each shoe, and connection means between said shoes and the other of said plates, whereby relative movement of said other plate causes movement between said shoes along certain of the angularly related surfaces.

3. In a spring group having spaced plates with interconnecting coiled springs, the combination of at least one friction surface connected to one of said plates, at least one friction shoe connected to the other of said plates and engaging said surface, a wedging shoe in wedged engagement with said one shoe and said one plate, spring means comprising one spring engaging said wedging shoe and said one plate and operative to maintain wedged engagement between said friction shoe and said wedging shoe, and another spring engaging said one shoe and said one plate and operative to maintain the connection between said one shoe and said other plate.

4. In a spring group having spaced interconnected plates, upstanding walls integral with one of said plates and forming a boxlike pocket thereon, friction surfaces on the inboard faces of certain of said walls, friction shoes disposed substantially within said pocket and engaging said surfaces, a spring resiliently engaging each shoe, said shoes being provided with wedge surfaces, said wedge surfaces cooperatively engaging each other in a plane disposed diagonally of the pocket, and a direct connection between said shoes and the other of said plates, whereby vertical movement of said other plate causes relative movement between said shoes along said wedge surfaces.

5. In a spring group, spaced plates with interconnecting coiled springs, friction surfaces on one of said plates, a friction shoe directly engaging one of said friction surfaces and the other of said plates, an independent coiled spring disposed between said one plate and said shoe and directly engaging said shoe, a wedge surface on said shoe remote from said one friction surface and said one plate and in oblique relation therewith, another friction shoe disposed between said wedge surface and the other of said friction surfaces, and another independent coiled spring compressed between and engaging said other friction shoe and said one plate operative to urge said other shoe into wedged engagement with said wedge surface and said friction surface.

6. In a spring group spaced plates flexibly movable toward and away from each other, vertical inboardly facing friction surfaces disposed transversely on one of said plates, a friction shoe associated with each of said surfaces, an area of inclined planed engagement between said shoes, and spring means urging said shoes upwardly and at least one of said shoes into engagement with the other of said plates, said spring means comprising an independent coil spring for each shoe compressed between said one plate and the related shoe.

7. In a spring group, spaced plates operatively movable toward and away from each other and flexibly interconnected by a plurality of coiled springs, a vertically disposed friction surface carried by one of said plates, a

horizontally disposed friction surface carried by the other of said plates, a friction shoe having normally related surfaces constantly engaging the horizontal friction surface and the vertical friction surface, respectively at all operative positions of the spaced plates, a wedging shoe, and spring means supporting said wedging shoe and urging it to abut said friction shoe and urge same into pressured engagement with the mentioned friction surfaces, said spring means comprising coil springs seated on said one plate and engaging their respective shoes along compressional axes normal to said one plate.

8. in a spring group, spaced plates interconnected by a plurality of coiled springs, spaced parallel vertically disposed friction surfaces on one of said plates, another friction surface on the other of said plates, friction shoes slidably engaged between said parallel surfaces, one of said shoes engaging said other surface, said friction shoes having an area of common engagement defining a plane obliquely related to said friction surfaces, a coiled spring seated on said one plate supporting one of said friction shoes and maintaining same in engagement with said other surface, and another coiled spring seated on said one plate engaging the other of said friction shoes and operative to wedge said friction shoes into engagement with said parallel friction surfaces, the compressional axes of said springs being normal to the plane of said other sur face.

9. In a spring group, spaced flexibly interconnected plates, friction surfaces on one of said plates, friction shoes associated with friction surfaces and engaging each other along a plane having an inclined relation to the surfaces, one of said shoes being connected to the other of said plates, and the other of said shoes being without connection thereto, and spring means on said one plate engaging said friction shoes and urging same outwardly into engagement with said friction surfaces, said spring means comprising a separate spring directly engaging each shoe.

10. In a spring group having spaced resiliently interconnected plates and a friction device disposed therebetween, the combination of spaced friction surfaces on one of said plates, another friction surface on the other of said plates, a friction shoe disposed intermediate said friction surfaces, another friction shoe disposed intermediate said friction surfaces and in inclined planed engagement with the first mentioned friction shoe, and spring means engaging said shoes and operative to maintain said shoes in engagement with all of said friction surfaces, said spring means comprising a pair of coiled springs compressively engaging at adjacent ends thereof said one plate and each of said shoes, respectively.

11. In a spring group, ble toward and away from each other and interconnected by a plurality of coiled springs, a friction surface on each plate, a friction shoe having normally related surfaces constantly engaging said friction surfaces, a wedge shoe disposed intermediate one plate and said friction shoe, and a pair of springs reacting between said one plate and their respective shoes along compressional axes normal to the plane of said one plate operative to urge said wedge shoe into wedge engagement with the friction shoe and said one plate and to maintain the friction shoe in pressured engagement with the friction surfaces at all operative positions of the spaced plates.

References Cited in the file of this patent UNITED STATES PATENTS 754,679 Moore Mar. 15, 1904 1,008,670 OConnor Nov. 14, 1911 1,169,862 Peycke Feb. 1, 1916 2,234,988 Sproul Mar. 18, 1941- 2,306,398 Light Dec. 29, 1942 2,490,738 Lehrman Dec. 6, 1949 2,561,308 Cottrell July 17, 1951 2.583.635 Dath Ian. 29, 1952 spaced plates operatively mova- 

